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Traffic heat map of New Castle County, Delaware: 1,099 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Delaware Turnpike and I 95

New Castle County, Delaware Traffic Counts

Traffic analytics for New Castle County, Delaware, calculated from real-world mobile and sensor networks on 27,313 road segments (1,099 road miles, about 212 ft each). It has the busiest roads of any county in Delaware, averaging 7,984 vehicles a day. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

Total Traffic Volume & Performance in New Castle County, Delaware

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day7,984
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

8.2%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

34.7 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

21.3%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

45.5 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$104,645

Our data shows 7,984 vehicles per day on the average road in New Castle County, Delaware, and 12,194,149 vehicle-miles traveled per day (≈4.5 billion per year) across its 1,099 miles of monitored roads. About 1 in 12 vehicles is a truck, in line with Delaware (7.8%).

The busiest roads of any county in Delaware

At 7,984 vehicles per day, the average monitored road in New Castle carries 30% more traffic than the state average of 6,126, suggesting more demand on each road - more exposure for roadside businesses, and more competition for road space. Across the whole network, that travel is about 53% of Delaware's statewide total. New Castle stands out as having the highest traffic volume in Delaware - 7,984 vehicles per day.

Journey times here (34.7 minutes on average) closely track the state level. It also posts the highest average travel time in Delaware, at 34.7 minutes.

At 22% higher than the state level, the 21.3% congestion ratio signals more pronounced congestion - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in New Castle County, Delaware

Trafficvehicles per day18,249
Trucks10.5%
Average travel time40.4 min
Congestion ratio36.6%
Drivers’ average age45.7 yrs
Drivers’ average income$105,193

A little more than half of the driving in New Castle County, Delaware happens on highways: 64% of all vehicle-miles. The average highway carries 18,249 vehicles per day, 185% more than the average non-highway road in the same area, which carries 6,398 vehicles per day.

With 32% of the road miles (353 miles in 3,654 segments), highways punch above their length, carrying 7,843,368 vehicle-miles traveled per day (≈2.9 billion per year).

That is the most highway travel volume of any county in Delaware.

The highest highway truck share of any county in Delaware

Highway truck concentration here runs 6% higher than the state average, at 10.5%. The highway traffic mix is typical for Delaware: neither freight- nor commuter-dominated.

By share, New Castle has the highest highway truck concentration in Delaware, at 10.5%. At roughly 2,334 trucks per day, New Castle carries the highest volume of highway trucks in Delaware.

non-highway traffic icon

Non-highway Traffic in New Castle County, Delaware

Trafficvehicles per day6,398
Trucks3.9%
Average travel time33.8 min
Congestion ratio19.0%
Drivers’ average age45.2 yrs
Drivers’ average income$104,060

A significant share of driving in New Castle County, Delaware, 36% of vehicle-miles, happens on local roads. The average non-highway road carries 6,398 vehicles per day.

Spread over 747 miles and 23,659 segments, 68% of the road network, local roads carry a lighter load per mile: 4,350,781 vehicle-miles traveled per day (≈1.6 billion per year). Trucks make up 3.9% of non-highway traffic, about 1 in 25 vehicles.

The highest driver income of any county in Delaware

The concentration of trucks on non-highway roads is 63% lower than on highways.

The non-highway congestion ratio of 19.0% is 30% higher than the state level, suggesting slower local mobility than the state average.

Trips here originate from the highest average driver income in Delaware, at $104,645. At 46 years, New Castle's median driver age is the lowest in Delaware.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and a long afternoon plateau from 12:00 PM to 6:00 PM, with volumes reaching approximately 68% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 15% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even April–June, the busiest stretch, runs only +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -8% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In New Castle County, Delaware, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+4% in high season).

New Castle County vs. Delaware Traffic Comparison

Of the four measures, average daily traffic per road differs most: New Castle County runs 30% above the Delaware average.

MetricNew Castle CountyDelaware averageDifference
Traffic7,9846,126+30.3%
Truck % (Total Traffic)8.2%7.8%+5.2%
Truck % (Highway)10.5%9.9%+6.2%
Avg. Travel Time34.7 min33.6 min+3.2%

How New Castle County compares

New Castle County moves more traffic than any nearby county

Against the 4 nearest areas, New Castle County moves 2.7 times the total daily travel; it has the second busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

New Castle County and the 4 nearest county-level areas by centroid distance, with the Delaware average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
New Castle County7,9848.2%12,194,14934.7 min21.3%
Cecil County, Maryland4,10413.9%3,250,79834.6 min11.8%
Salem County, New Jersey3,36214.3%1,847,13331.9 min10.9%
Delaware County, Pennsylvania9,4826.2%6,862,36035.7 min25.2%
Gloucester County, New Jersey6,76410.5%5,932,90032.0 min19.2%
Delaware average6,1267.8%N/A33.6 min17.4%

New Castle County ranked within Delaware

New Castle County ranked among 3 county-level areas in Delaware (1 = highest).
MeasureNew Castle CountyDelaware rank
Traffic volume (AADT)7,984#1 of 3
Highway vehicle-miles per day7,843,368#1 of 3
Truck share on highways10.5%#1 of 3
Highway trucks per day1,914#1 of 3
Average travel time34.7 min#1 of 3
Average driver income$104,645#1 of 3
Average driver age45.5 yrs#3 of 3

Busiest roads in New Castle County, Delaware

On their busiest stretches, the three busiest roads in New Castle County carry 83,127 vehicles a day on average, 10.4 times the typical road in the county (7,984).

Delaware Turnpike is the busiest road, at 97,920 vehicles a day, 13,940 of them trucks (14.2%). It also carries the most trucks.

Freight stands out on Delaware Memorial Bridge and Wilmington Bypass: trucks are 18.4% and 14.7% of the traffic there, against 8.2% county-wide.

Korean War Veterans Memorial Highway carries longer journeys than most roads here, with a median trip of 50.9 minutes against 34.7 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Delaware TurnpikeMotorway · 97,920vehicles13,940trucks · 14.2%
Road class
Motorway
Congestion ratio
58.8%
Median trip time
49.6 min
Drivers’ median age
45.1 yrs
Drivers’ average income
$95,927

Delaware Turnpike is one of the more congested roads here: trips take 59% longer than at free-flow speed, against 21% county-wide.

2I 95Motorway · 76,263vehicles6,263trucks · 8.2%
Road class
Motorway
Congestion ratio
90.1%
Median trip time
40.0 min
Drivers’ median age
45.3 yrs
Drivers’ average income
$100,961

Delays build on I 95: its congestion ratio of 90% over free-flow time is well above the county's 21%.

3Delaware Memorial BridgeMotorway · 75,198vehicles13,798trucks · 18.4%
Road class
Motorway
Congestion ratio
47.1%
Median trip time
49.3 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$87,468

A main artery: Delaware Memorial Bridge's busiest stretch carries 9.4 times the county average; trucks are 18.4% of it, above the county-wide 8.2%.

4Wilmington BypassMotorway · 69,457vehicles10,215trucks · 14.7%
Road class
Motorway
Congestion ratio
53.9%
Median trip time
50.1 min
Drivers’ median age
44.0 yrs
Drivers’ average income
$87,793

Drivers on Wilmington Bypass are on long journeys, a median 50.1 minutes against 34.7 county-wide: a through route more than a local street.

5Korean War Veterans Memorial HighwayMotorway · 58,240vehicles7,711trucks · 13.2%
Road class
Motorway
Congestion ratio
56.3%
Median trip time
50.9 min
Drivers’ median age
46.2 yrs
Drivers’ average income
$104,467

A freight route: trucks are 13.2% of the traffic on Korean War Veterans Memorial Highway's busiest stretch, 1.6 times the county-wide 8.2%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Delaware TurnpikeMotorway · #1 by traffic97,920vehicles13,940trucks · 14.2%
2Delaware Memorial BridgeMotorway · #3 by traffic75,198vehicles13,798trucks · 18.4%
3Wilmington BypassMotorway · #4 by traffic69,457vehicles10,215trucks · 14.7%
4Korean War Veterans Memorial HighwayMotorway · #5 by traffic58,240vehicles7,711trucks · 13.2%
5I 95Motorway · #2 by traffic76,263vehicles6,263trucks · 8.2%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

New CastleDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near New Castle County

The same traffic breakdown for the areas closest to New Castle County, Delaware.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.